门禁系统现场控制部分主要指现场控制器、读卡器、锁具、按钮、报警设备、卡片等。现场控制器又称门禁机，是系统信息输入和执行操的设备。                                           单门门禁控制器                                                                                                                                                                                                                                                                              单门门禁控制器能够连接符合Wiegand格式输出的读卡器和CLK-DATA格式输出的读卡器。                                                                                                                                               （1）功能特点                                                                                                                                                                                                                                                                                   1、适应性。即可联机使用也可脱机独立使用，无须设置，联机使用时可以通过监控系统管理软件来实现门禁监视、数据查询、出入门权利变更等多种功能。在脱机使用的情况下，需要用管理卡对系统实施管理                                                                                                                                                                                                                                                                                                       2、兼容性。可与以Wiegand格式输出的读卡器和CLK-DATA格式输出的读卡器实连接。                                                                                                                                                                                                                                                                                                 3、反折反功能。门禁机具有反折反功能设置，对于采用双向划卡的用户可与选择采用此功能，人员划卡进入后，必须划卡出门，否则不允许再次进入；人员划卡出门后，必须划卡进入，否则不允许出门。                                                                                                                                                                                                                                                    4、时区管理。多个时区管理，每一时区可以单独灵活设置，每个人员可以同时选择多个时区权限。                                                                                                                               5、人员管理。标准容量8000执卡者，也可以扩展。                                                                                                                                                                                                                   6、断电保护。采用特殊记忆体保护装置，门禁编码及系统数据不会因断电而消失。                                                                                                                                                           7、报警功能。具有超时报警、非法侵入报警、防撬报警功能。具备防破坏触点。当被破坏或侵入时具有报警输出信号，且具备开门                                                                                                                                                                                                                                                                                                            8、开门及监控时间可调。开门时间可自由设定。                                                                                                                                                                                                                   9、门禁操作方式。                                                                                                                                                                                                                                                                             (1)只刷卡：执卡者使用有效卡刷卡即可进入。                                                                                                                                                                                                                              (2)只用密码：人员只需键入有效密码即可进入。                                                                                                                                                                                                                          (3)刷卡加密码：执卡者首先刷卡，待门禁机出现相应提示后在键入与卡片对应的有效密码即可进入。                                                                                                                         (4)只用工程码方式：持卡者刷卡，门禁机检验此卡的工程码是否在有效范围内，并颁布检验卡号。工程码有效即可以进入。